Geekzone: technology news, blogs, forums
Welcome Guest.
You haven't logged in yet. If you don't have an account you can register now.

647 posts

Ultimate Geek

# 230494 26-Feb-2018 15:16
Send private message



I have 3x aerial wall sockets, 2 of which are being used. The patch panel in our garage contains a splitter joining the 3x wall sockets to the DVB-T aerial on the roof.




I touched the splitter the other day and got a large tingle/zap from it. I have put a multimeter on it and detected a current (in the 10's of v I think, not 100's) but very low current (amps).


I have narrowed it down to our 2013 Panasonic Viera E6. When I unplug the aerial from the TV there is no tingle/zap from the splitter. I can't feel anything when touching the aerial socket on the back of the TV. Unplugging the other TV (32" Veon) did nothing.




The splitter is not screwed to the patch panel - it's just floating. Is this a small current a normal phenomenon? Thanks.

Create new topic
3394 posts

Uber Geek

  # 1964611 26-Feb-2018 15:43
Send private message

Not a dual mode TV is it configured with DVB-S?


Youll get 12v out on it if enabling the DISCQ switch if so.

189 posts

Master Geek

  # 1964613 26-Feb-2018 15:45
Send private message



Not a dual mode TV is it configured with DVB-S?


Youll get 12v out on it if enabling the DISCQ switch if so.





Too true, didn't think about DVB-S, although 2013 would be pushing it for availability of inbuilt Sat tuners


1077 posts

Uber Geek

  # 1964614 26-Feb-2018 15:50
Send private message

Yeah, I've been zapped exactly as you say. Also can happen with laptops and other double insulated appliances with switch-mode power supplies. Re touching the TV plug directly and not getting a zap - I've found that the finger tips insulate you from low voltages, but sensitive skin between you fingers or on the inside your arm don't, so you can be mucking about with a coax with no problems, then it touches your inside arm and you get zapped. 


FYI some TV's and set top boxes put 12 to 18 volts out the antenna port on purpose in order to power mast head amps etc.

647 posts

Ultimate Geek

  # 1964620 26-Feb-2018 16:01
Send private message

Thanks guys.

You might be interested that I got a very fast reply from Panasonic basically saying there's nothing wrong with the TV and that they get similar readings. They also attached a PDF that explains this phenomenon with double-insulated products. It says you can get a reading of up to 90v, but nominally less than 0.5mA, and that it is within specification and is safe.

1956 posts

Uber Geek

  # 1965952 28-Feb-2018 15:16
Send private message

Could be just static discharge. In dry weather I quite often get a significant zap getting out of the car.

647 posts

Ultimate Geek

  # 1965953 28-Feb-2018 15:17
Send private message

Nope. I can't touch it for long. It's constant. Worse than licking a 9v battery. ;-)

Create new topic

Twitter and LinkedIn »

Follow us to receive Twitter updates when new discussions are posted in our forums:

Follow us to receive Twitter updates when news items and blogs are posted in our frontpage:

Follow us to receive Twitter updates when tech item prices are listed in our price comparison site:

News »

Microsoft launches first Experience Center worldwide for Asia Pacific in Singapore
Posted 13-Nov-2019 13:08

Disney+ comes to LG Smart TVs
Posted 13-Nov-2019 12:55

Spark launches new wireless broadband "Unplan Metro"
Posted 11-Nov-2019 08:19

Malwarebytes overhauls flagship product with new UI, faster engine and lighter footprint
Posted 6-Nov-2019 11:48

CarbonClick launches into Digital Marketplaces
Posted 6-Nov-2019 11:42

Kordia offers Microsoft Azure Peering Service
Posted 6-Nov-2019 11:41

Spark 5G live on Auckland Harbour for Emirates Team New Zealand
Posted 4-Nov-2019 17:30

BNZ and Vodafone partner to boost NZ Tech for SME
Posted 31-Oct-2019 17:14

Nokia 7.2 available in New Zealand
Posted 31-Oct-2019 16:24

2talk launches Microsoft Teams Direct Routing product
Posted 29-Oct-2019 10:35

New Breast Cancer Foundation app puts power in Kiwi women's hands
Posted 25-Oct-2019 16:13

OPPO Reno2 Series lands, alongside hybrid noise-cancelling Wireless Headphones
Posted 24-Oct-2019 15:32

Waikato Data Scientists awarded $13 million from the Government
Posted 24-Oct-2019 15:27

D-Link launches Wave 2 Unified Access Points
Posted 24-Oct-2019 15:07

LG Electronics begins distributing the G8X THINQ
Posted 24-Oct-2019 10:58

Geekzone Live »

Try automatic live updates from Geekzone directly in your browser, without refreshing the page, with Geekzone Live now.

Support Geekzone »

Our community of supporters help make Geekzone possible. Click the button below to join them.

Support Geezone on PressPatron

Are you subscribed to our RSS feed? You can download the latest headlines and summaries from our stories directly to your computer or smartphone by using a feed reader.

Alternatively, you can receive a daily email with Geekzone updates.